97 STAT. 424 PUBLIC LAW 98-76—AUG. 12, 1983 quarter. Proper adjustments shall be made in the amounts subsequently transferred to the extent prior estimates were in excess of or less than the amounts required to be transferred. (3) REVENUE INCREASES FROM TAX ON SUPPLEMENTAL ANNU- ITIES NOT INCLUDED. — Paragraph (1) shall not apply to tax liabil- ities attributable to supplemental annuities paid under section 45 USC 231a. 2(b) of the Railroad Retirement Act of 1974. (d) OVERALL MINIMUM BENEFIT TREATED AS TIER 1 BENEFIT.— Ante, p. 80. Paragraph (4) of section 86(d) of such Code (defining tier 1 railroad retirement benefit) is amended by inserting "3(f)(3)," after "3(a),". SEC. 225. TECHNICAL AMENDMENTS. (a) AMENDMENTS RELATING TO APPLICATION OF CONTRIBUTION BASE ON AN ANNUAL BASIS. — (1) Paragraph (2) of section 3231(e) of the Internal Revenue 26 USC 3231. Code of 1954 (defining compensation) is amended to read as follows: "(2) APPLICATION OF CONTRIBUTION BASES. — "(A) COMPENSATION IN EXCESS OF APPLICABLE BASE EX- CLUDED. — "(i) IN GENERAL.—The term 'compensation' does not include that part of remuneration paid during any calendar year to an individual by an employer after remuneration equal to the applicable base has been paid during such calendar year to such individual by such employer for services rendered as an employee to such employer. "(ii) REMUNERATION NOT TREATED AS COMPENSATION EXCLUDED. — There shall not be taken into account under clause (i) remuneration which (without regard to clause (i)) is not treated as compensation under this subsection. "(B) APPLICABLE BASE. — "(i) TIER l TAXES.—Except as provided in clause (ii), the term 'applicable base' means for any calendar year the contribution and benefit base determined under 42 USC 430. section 230 of the Social Security Act for such calendar year. "(ii) TIER 2 TAXES, ETC.—For purposes of— " (I) the taxes imposed by sections 3201(b), Ante, pp. 420, 3211(a)(2), and 3221(b), and '^^^- "(ID computing average monthly compensation under section 3(j) of the Railroad Retirement Act of 45 USC 231b. 1974 (except with respect to annuity amounts de- termined under subsection (a) or (f)(3) of section 3 of such Act), clause (2) of the first sentence, and the second sentence, 42 USC 430. of subsection (c) of section 230 of the Social Security Act shall be disregarded. "(C) SUCCESSOR EMPLOYERS. —For purposes of this para- 26 USC 3121. graph, the second sentence of section 3121(a)(1) (relating to successor employers) shall apply, except that— "(i) the term 'services' shall be substituted for 'em- ployment' each place it appears, "(ii) the term 'compensation' shall be substituted for 'remuneration (other than remuneration referred to in
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